Seat back hinge

Details Seat back hinge Seat back hinge

1977-07-15

1979-03-13

Frazier, Roy D.

Chairs and seats

Movable back

Tiltable

B60N 102

Patent

active

041439139

ABSTRACT:
An improved inertially locking hinge for vehicular seats which permits the seat back to be pivoted downwardly when the vehicle is not subjected to inertial forces but which, under the influence of selected inertial forces, causes a simple metal block element to pivot into engagement with ratchet teeth on the movable of the hinge elements. Weight and space savings are achieved by using a small thrust carrying block element secured in a plastic case and the case is pivotal in a slightly arcuate opening and the case enclosing a mass positioned to act between parallel spaced-apart fixed plates, the plates pivotally supporting the principal hinge point and seat back support. The block element carries the thrust of the teeth into the fixed plates at a buttress at the arcuate opening.

REFERENCES:
patent: 3549202 (1970-12-01), Boschen et al.
patent: 3628831 (1971-12-01), Close
patent: 3848923 (1974-11-01), Dehler
patent: 3900225 (1975-08-01), Wirtz et al.
patent: 3901460 (1975-08-01), Dully et al.
patent: 4010979 (1977-03-01), Fisher et al.

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